Question

me ajudem (regra de 3)

Answer 1

RESPOSTA

A) 3×12 = 9 × X

36 = 9 X

36\9 = X

4 = X

B)15 × 7 = X × 21

105 = 21 X

105\21 = X

5 = X

C)3 × 15 = X × 5

45 = 5 X

45\5 = X

5 = X

D)3 × 6 = X × 9

18 = 9X

18\9 = X

2 = X